Improvement in conveyer-belting



No. 39,716. PATENTEDVSEPT. l, 1863.

J. CAMPBELL.

CONVEYER BELTING UNITED- STATE-s- PATENT OFFICE.

- vJOHN CAMPBELL, or sax-Louis', MI-sseUnI.

IMPROVEMENT IN CQNVEYERjBELTING.

VSpecification forming part of Letters Patent No. 39,716, datedSeptember 1, 1863.

To all whom 'it may concern:

Be it known that I, JOHN CAMPBELL, of the city and county of St. Louis,and State of Missouri, haveinvented a new and useful .Improvement inConveyer-Belting; and I do las a new article of manufacture, a fabricfor conveyerbellting which mav possess all the eiciency of leather orrubber, while at the same time it may be produced at much less. expense;and the nature of my invention re.. lates to the employment or use ofconveyerbelting formed of hemp, as hereinafter set forth andrepresentedZ as a new article of manufacture.

In reference to the accompanying drawings, Figure 1 represents a sectionof my improved belting as prepared for use. Fig. 2 represents a strandof the warp, and Fig. 3 a strand of the filling of the said belt'ing.The warp or longitudinal strands of the said belting will be of hemp,formed of single strands or parts, as A, slightly twisted to give themcontinuity and strength. The strands which form the lling of thebelting, and also the longitudinal strands which assist or combine withthe filling in forming the edges or selvage of the belting, will be madedouble orof two parts twisted together, as shown clearly in Fig. 3, bymeans'ot' which the said edges of the belting will be stronger and moredurable than the main body thereof, and thus adapted to meet andwithstand the friction and wear which, in operating a belt, isnecessarily much greater at its edges than at any other part. The saidbelting may be formed in the ordinary manner of weaving fabrics composedof similar material. The buckets or cups necessary to be employed upon aconveyerbelt may be attached to the aforesaid belting by being rivetedtoinetallic plates upon the other side of the same. In order to give tothe said b elting the requisite adhesiveness adapted to its employmentasa conveyenbelt, it may be saturated with tar b v being dipped therein,and then pressed in the usual manner.

Thorough practical experiments have fullyV proved the etliciency ot'.the above-described hemp belting to be fully equal to the best qualityof leather or rubber employed for a 1i he purpose, and that itsdurability compares favorably with the same. While the cost ofmanufacturing is far less than the leather or rubber, great economy istherefore difected in the manufacture ot' conveyerbelting.

Having thus described the object and use of my invention, what I claimas new, and desire to secure by Letters Patent, is-

The use of the hemp belting, before described, made substantially asherein represented and set forth, as a new article of manufacture, forthe purpose specified.

In testimony whereof I have hereunto set my hand and seal this 29th dayof May, 1863.

JOHN CAMPBELL. [L 5.]

Witnesses:

H. E. CLIFTON, y HERRM. BoEcKn.

